Power molding-machine.



A. S. BIXBY.

POWER MOLDING MACHINE.

APPLICATION FILED SEPT. 4. I9I4.

1,158,398. Patented 0013.26, 1915.

COLUMBIA PLANOGRAFH C0,.WASHINu'rON. n. c

ifJNTTED STATES PATENT -TQFFICE.

ALLAN S. BIXBY, OF INDIANAPOLIS, INDIANA, ABSIGNOB TO'T'HE B. & B. MFG. 00., 01E

mmANAroms, INDIANA, A CORPORATION or'INprANA.

IEOYNEB' MOLDING-MACHINE.

Specification of Letters Patent.

Application filed September 4, 1914. Serial No. 880,145.

all whom it may concern:

Be it known that I, ALLAN S. Bixnr, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Power Molding-Machine, of which the following is a specification.

Much labor and time may be saved in foundry work by using power instead of the ordinary hand rammers for packing the sand in the flasks; and in addition this makes a much better and more umforxnl packed mold in mostcases. However, d1 ferent pressures are required for different kinds and sizes of work, and these aredifiicult to obtain with any precision with a simple fluid-pressure operated device, for compressed air is ordinarily the most convenient source of power for this work. It 18 also desirable at times to change the size of a molding machine to accommodate some larger piece of work than is usually taken.

It is the object of my present invention to provide a power molding machine which can easily be made to produce any desired pressure; and which can readily be changed in size. In accomplishing this object I provide a readily removable power device, such as a cylinder and piston operated by compressed air, so that it can be removed and another one of different size easily substituted, thus giving a different pressure on the work with the same air pressure; and I preferably lock such power device in place by the mold table, so that the removal of the latter makes it possible to remove the former. In addition, I mount the pivot arms of the bail on long pins carrying heavy washers, so that by locating the washers on the inner or outer sides of the pivot arms a different length of bail may be taken, thus changing the size of the machine.

The accompanying drawing illustrates my invention.

Figure 1 is a front elevation of a power molding machine embodying my invention; Fig. 2 is a side elevation thereof; Fig. 3 is a plan view on a smaller scale of such machine with the bail and mold table removed; and Fig. 4 is a sectional view showing the pneu- 11122160 connection to the bottom of the cylinin er.

. The main frame has two supporting uprights connected by a straight lower cross bar 11 and a curved upper cross-bar 12, and a mold table 13 having two supporting slide rods 14 is mounted in this frame for vertical slidin movement, the slide rods 14 extending ownward through alined guide openings 15 in and near the ends of the upper and lower cross bars. The mold table and its slide bars may be lifted vertically clear of the frame. Theslide bars 14 when in place pass through notches 16 in peripheral extenslons of the upper and lower heads 17 and 18 ofa fluid pressure cylinder 19 located between the cross bars 11 and 12, adjacent faces ofthe lower cylinder head 18 and the lower cross bar, v11 having central cooperating bosses 20 and-21for supporting the cylinder 19 centrally, and the boss 20 conveniently having a central depending extension 22 which fits in a corresponding central opening 23 through the boss 21 and cross bar 11 to position the cylinder. An opening 24 extends through the extension 22, boss 20, and cylinder head 18, this opening being threaded tqzreceive the upper end of anair pipe25 whichjextends from below the cross bar 11 nearlythrough the opening 23 and is connected to any suitable source of fluid lpressure, such ascompressed air. This pipe as in it a suitable control valve 26, arranged at any desired point, and a union 27 arranged below the cross-bar 11 and between the uprights 10 so that by disconnecting such union that part of the pipe which e. tends through the opening 23 may be unscrewed from the o ning 24 without disturbing the remain er of the pipe 25. A piston 28 is mounted in the cylinder 19 and carries an upwardly extending piston rod 29 which bears against the bottom of a depres- S101). or pocket in the under side of the mold table 13 for operating the latter. The upper cross bar 12 is so curved that it is entirely in fnont of the piston rod 29, as is clear from Fig. 3. The cylinder 19 has one or more openings 30 in its side walls near but not at the top, so that the piston may move freely up and down so lon as it is below such openings but is cushioned by the pocketed air above it as soon asit passes above such openings. There may be any number of cylmdersand pistons, of varying piston area but all of the samesize between notches 16,

and'any one of these cylinders with its ton maybe placed in the frame, as desired.

reverse series of operations. Each cylinder and piston will produce a given total pressure upward on the mold table, for a given air pressure; so that any desired pressure, according to the character of the work and the air pressure available, may be obtained by the proper choice of cylinders. Cylinders can be changed easily and quickly. Ordinarily only a few sizes of cylinders are requiaed, though any desired number may be use The mold table '13 cooperates with a bail 40 through the ends of which pass threaded rods 41 on which the bail is adjustable by nuts 41. The lower ends of the rods 41 are pivoted on trunnions 42, which project from the uprights 10, so that the bail may be swung into operative position over the mold table 13, as shown in full lines in Fig. 2, or may be swung back, as shown in dotted lines in such figure, when in this latter position permitting the work to be I placed on and removed from the mold table more easily. Stops 43 and 44 limit the for- .ward and backward swinging of the pivot arms 41. Sometimes bails 40 of different length are required, and to this end the trunnions 42 are made long and provided with heavy washers 45; If the washers 45 are put on the trunnions first, and the pivot ends of the arms 41 then placed on such trunnions, a comparatively long bail 40 is received; while if the pivot ends of the arms 41 are first placed on the trunnions and the washers 45 are placed over them, a bail of less length is used. This permits the two sizes of machines to be made with the same frame or a single frame to be changed to receive different bails as occasion requires.

. In operation, with any cyl nder 19 and any bail 40 in place, the flask in which the sand is to be compressed is placed on the mold table 13, the bail 40 is swung forward to the full line position shown in Fig. 2, and the valve 26 is open to admit air beneath the piston 28, which is forced upward by the compressed air and forces the mold table 13 toward the bail 40, packing the sand in the flask between them.

I claim as my invention:

1. A power molding machine, comprising a frame, a power device removably mounted I in said frame, and a mold table operated by said power device, said mold table being removable from the frame and when in place locking the power device in place in the frame. v

A power molding machine, comprising a frame having a lower cross bar and an upper cross bar, a fluid-pressure cylinder mounted between said cross bars, a piston mounted within said cylinder, a piston rod extending from said piston above said up per cross bar, said upper cross bar being bent so that the piston rod passes on one side of it, and aimold table mounted in said frame and resting on the upper end of :said piston rod, said mold table having guide rods which extend downward through suitable openings in the frame and interlock with said cylinder to hold the latter in place.

3. A power molding machine, comprising a frame having a lower cross bar and an upper cross bar, a fiuid-pressure cylinder mounted between said cross bars, a piston mounted within said cylinder, a piston rod extending from said piston above said upper cross bar, and a mold table mounted in said frame and resting on the upper end of said piston rod, said mold table having guide rods which extend downward through suitable openings in the frame and interlock with said cylinder to hold the latter in place.

4. A power molding machine, comprising a frame having a lower cross bar and an upper crossbar, a fluid-pressure cylinder removably mounted between said cross bars, a piston mounted within said cylinder, a piston rod extending from piston above said upper cross bar, said upper cross bar being bent so that the piston rod passes on one side of it, and a mold table mounted in said frame and resting on the upper end of said piston rod. r

5. A power molding machine, comprising a frame having a lower cross bar and an'upper cross bar, a fiuid-pressure cylinder removably mounted between said cross bars, a piston mounted within said cylinder, a piston rod extending from said piston above said upper cross bar, said cylinder and piston and piston rod being removable from the frame while the cross bars of the latter are in working position, and a mold table mounted in said frame and detachably resting on the upper end of said piston rod.

6. A power molding machine, comprising a frame, a mold table slidably mounted therein, and a fluid-pressure cylinder and piston mounted in said frame for operat ing said mold table, said mold table and cylinder interlocking so that the mold table when in'place holds the cylinder in place and when removed permits the cylinder to be removed.

' 7. A molding machine, comprising a frame, a mold table carried thereby and reciprocable vertically, a bail for co6peration with said mold table, pivot arms carrying said bail, trun'nions on the frame for pivotally supporting said pivot arms, and washers on such trunnions Which can be placed on either side of said pivot arms as desired to change the distanoebetweensaid pivot arms to receive different sized bails. v i 8. A power molding machine, comprising a frame, a' mold table slidably mounted thereon, and a cylinder and piston removably mounted in said frame and operating on said mold table, saidcylinder and said frame having cooperating positioning parts. 9. A power molding machme, comprising a frame, a mold table 'slidaloly mounted" thereon, and a cylinder andpiston removably mounted in said frame for operating said mold table, said cylinder and piston I Copies'of this-patent may be obtained for and said frame and table having interfitting parts for positioning the cylinderand piston. v it 10. A power molding machine, comprising a frame, a mold table slidably mounted thereon, and a plurality of cylinders and i pistons any one ofwhich may be removably hundred andfourteen. I

ALLAN s.- BIXBY.

Witn'essesz I 7 WILLIAM L. BEAUOHAMP,

MORRIS H. B'ANNISTER.

five cents each, by addressing the Commissioner of Patents, Washington, D. G.

"mounted in said frame for operating said 7 

